Examples

Emails

Matches valid email addresses.

^(?:[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,})$

Another pattern to match valid email addresses.

^\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b$

Yet another pattern to match valid email addresses.

^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

URLs

Matches URLs with optional protocol and subdomains.

^(?:https?://)?(?:www\.)?[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}(?:/\S*)?$

Another pattern to match URLs.

^(https?|ftp):\/\/[^\s/$.?#].[^\s]*$ 

Yet another pattern to match URLs.

^(https?|ftp):\/\/[a-zA-Z0-9]+\.[a-zA-Z0-9]+\.[a-zA-Z0-9]+\.[a-zA-Z0-9]+\/[^\s]*$

Numbers (with and without decimals)

Matches numbers with optional sign and decimal points.

^-?\d+\.?\d*$

Another pattern to match numbers.

^-?\d+(\.\d+)?$

Yet another pattern to match numbers.

^-?[0-9]+(\.[0-9]+)?$

Dates of all known formats

Matches dates in various formats.

^(?:(?:0?[1-9]|1[0-2])[-\/.](?:0?[1-9]|[12]\d|3[01])[-\/.]\d{4})|(?:(?:0?[1-9]|[12]\d|3[01])[-\/.](?:0?[1-9]|1[0-2])[-\/.]\d{4})|(?:(?:0?[1-9]|1[0-2])[-\/.]\d{1,2}[-\/.]\d{2,4})$

Another pattern to match dates.

^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d$

Yet another pattern to match dates.

^(19|20)\d\d[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])$

Time in all known formats

Matches time in various formats.

^(?:0?[1-9]|1[0-2]):(?:[0-5]\d)(?::(?:[0-5]\d))?(?:\s?[APap][mM])?$

Another pattern to match time.

^([01]?[0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?$

Yet another pattern to match time.

^(0[0-9]|1[0-9]|2[0-3]):([0-5][0-9])(:[0-5][0-9])?$

Phone Numbers

Matches US phone numbers with optional area code and formatting.

^(?:\+?1[-. ]?)?\(?[2-9][0-9]{2}\)?[-. ]?[2-9][0-9]{2}[-. ]?\d{4}$

Another pattern to match phone numbers.

^(\+\d{1,2}\s?)?((\(\d{3}\))|\d{3})([\s.-]?)\d{3}([\s.-]?)\d{4}$

Yet another pattern to match phone numbers.

^([+]?[0-9]{1,2}[.-\s]?)?(\([0-9]{3}\)|[0-9]{3})[.-\s]?[0-9]{3}[.-\s]?[0-9]{4}$

Zip Codes

Matches US zip codes in various formats.

^\d{5}(?:-\d{4})?$

Another pattern to match US zip codes.

^\d{5}-\d{4}(?:\d{2})?$

Yet another pattern to match US zip codes.

^\d{5}(?:-\d{4})?$

Password Strength validation

Matches passwords with at least 8 characters, containing at least one uppercase letter, one lowercase letter, one number, and one special character.

^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$

Another pattern for password validation.

^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[a-zA-Z]).{8,}$

Yet another pattern for password validation.

^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=]).*$

File Extensions

Matches file extensions (e.g., .txt, .jpg, .pdf).

\.\w+$

Another pattern to match file extensions.

\.(?:jpg|gif|png|pdf|)$

IPv4 Addresses

Matches IPv4 addresses in dotted decimal notation.

^(?:\d{1,3}\.){3}\d{1,3}$

Another pattern to match IPv4 addresses.

^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$

Credit Card Numbers

Matches credit card numbers in various formats.

^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|3[47][0-9]{13}|6(?:011|5[0-9]{2})[0-9]{12})$

Another pattern to match credit card numbers.

^(?:\d[ -]*?){13,16}$

City, State Abbreviations

Matches US city names followed by state abbreviations.

^[a-zA-Z\s]+,\s*[A-Z]{2}$

Another pattern to match city names and state abbreviations.

^[a-zA-Z\s]+,\s*[A-Z]{2}$

Social Security Numbers

Matches US social security numbers in various formats.

^(?!000|666|9\d{2})\d{3}-(?!00)\d{2}-(?!0000)\d{4}$

Another pattern to match social security numbers.

^\d{3}-\d{2}-\d{4}$

Dollar Amounts

Matches dollar amounts in various formats.

^\$?\d{1,3}(?:,?\d{3})*(?:\.\d{2})?$

Another pattern to match dollar amounts.

^\$[0-9]+(\.[0-9]{2})?$

Hexadecimal Values

Matches hexadecimal values.

^(?:0[xX])?[0-9a-fA-F]+$

Another pattern to match hexadecimal values.

^#?([a-f0-9]{6}|[a-f0-9]{3})$

MAC Addresses

Matches MAC addresses in various formats.

^(?:[0-9a-fA-F]{2}[:-]){5}[0-9a-fA-F]{2}$

Another pattern to match MAC addresses.

^([0-9A-Fa-f]{2}[:-]){5}([0-9A-Fa-f]{2})$

HTML Tags

Matches HTML tags.

<[^>]*>

Another pattern to match HTML tags.

<[a-zA-Z][^>]*>